The Sulphur Dun crawler nymphs inhibit the riffles and runs of the moderate to slow currents. This type of water is found in the section of stream that falls on a slow to moderate decline in elevation as opposed to a steep decent. They are found in a wide range of waters including spring creeks, freestone streams and tailwaters. This Sulphur mayfly is found mostly in the Eastern U. S. and some Mid-Western Streams.

You can catch trout on imitations of the nymph anytime or the year. Crawler nymphs cannot hide underneath rocks and in tight places such as the clingers can and consequently, they are eaten more frequently than most other types of nymphs. That said, the best time to fish our "Perfect Fly" Sulphur Dun Nymph is just prior to a hatch. The nymphs become real active and loose a lot of their normal caution.

Nymph Presentation:These nymphs will move to the nearest, calmer, shallower water a few days prior to emerging. Usually this is only a few feet or less. When they begin to emerge to hatch they are very subject to being the meal of a hungry trout.

You can fish the nymph imitation prior to the hatch near the bottom using a strike indicator, without an indicator, or on the swing. We think you will be better off fishing a weighted nymph right on the bottom even though it is more difficult to detect strikes. The fly works best if it is slowly bouncing along the bottom of the stream.

In most situation, we use an up and across presentation. There are many situation where the surface of the water is smooth where he nymphs are hatching. In those cases you may want to use a down and across presentation. It's more difficult to get close to the trout in smooth water and the down and across cast lets you drift the fly over trout that are a good distance from you.

The leader should be from 8 to 12 feet long depending on the type of stream. Spring Creek and smooth flowing tailwaters require longer leaders and lighter tippets. Most of the time you can get by using a 5X tippet.